Picker-cam for looms



Patented Aug. 15, 1893.

UNTTED STATES PATENT OFFICE.

ABRAM D. EMERY, OF TAUNTON, MASSACHUSETTS.

PlCKER-CAM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 503,473, dated August15, 1893.

Application filed September 24, 1890. Renewed March 17 1893. Serial No.466,541. (No model.)

T0 on whom it may concern:

Be it known that I, ABRAM D; EMERY, of Taunton, Massachusetts, haveinvented certain Improvements in Picker-Cams for Looms, of which thefollowing is a specification.

This invention relates to a certain construction of picker cams forlooms, by which such cams are not only made capable of easy and accurateadjustment, but are effectually prevented from being thrown out ofadjustment by the shocks to which they are subjected in the operation ofthe loom. Picker cams are ordinarily secured by means of setscrewsinserted through their hubs and bearing upon the picker cam shaft. Tomake the fastening secure, such screws have to be bedded into the shaft,and there is thus formed a cavity in the surface of the shaft. It ishence difficult and in some cases impossible to securely hold the cam inposition after slight changes of adjustment, because the set-screw tendsto slip back into the cavity previously formed.

The present improvement consists in the provision of a circular faceplate which is rigidly keyed or otherwise immovably fastened to thepicker cam shaft, and in the provision of a cam toe provided with aconcen trically curved flaring shoulder adapted to bear upon the conicalperiphery of the face plate, and with a flange for bearing against theside of the face plate to which it is secured by transverse boltsinserted through concentric slots in the face plate and through saidflange and providedwith nuts, by means of which said flange is forcedagainst the face plate, and the flaring shoulder of the toe is clampedupon the conical periphery of the face plate. This construction permitsthe cam toe to be readily and accurately adjusted to any degree ofnicety however minute, and to be firmly secured in any position to whichit may be adjusted, while the shocks to which the cam toe is subjectedwhen in use are taken upon the periphery of the rigidly affixed faceplate instead of being taken upon the adjustable fastening devices insuch a direction as would tend to dislodge those devices.

The accompanying drawings illustrating the ordinary picker cam and theimproved construction herein described are as follows,

VIZ!

Figure 1 is a face view of an ordinary picker cam, and Fig. 2 is asection of the same taken through the plane indicated by the dotted lineoc-m on Fig. 1. Fig. 3 is a face view of a cam employing the presentimprovement. Fig. 4 is a section taken through the plane indicated bythe dotted line y-y on Fig. 3. Fig. 5 is an elevation showing the edgeof the improved cam; and Fig.6 is a section of a part of the improvedcam taken through the plane indicated by the dotted line 2-2 on Fig. 3.

The ordinary method of securing picker cams upon their shafts isillustrated in Figs. 1 and 2, in which, as will be seen, there isrepresented a face plate a provided with a hub or through which thereisinserteda set-screw a the inner end of which impinges upon the surfaceof the picker cam shaft a The earn too I; is fastened to the face plateby the transverse bolt b provided with a nut b The cam too is providedwith an inwardly projecting flange, the sides of which are convergentand bear against the radial shoulders b b with which the face plate isprovided. To adjust this cam,it is necessary to loosen the set-screw aand then after turning the face plate to the required position to againtighten the set-screw c By this mode of fastening the picker cam thereis an unavoidable indentation and abrasion of the surface of the camshaft, and the fastening at best is comparatively insecure, because theshocks to which the cam is subjected when in operation tend to turn itupon .its shaft. These difficulties are avoided by the presentimprovement which is illustrated in Figs. 3, a, 5, and 6 in which, aswill be seen, the face plate or provided with a hub a is by means of thekey 0 permanently secured to the cam shaft o The cam toe cl is fastenedto the face plate by means of the transverse bolts (1 cl insertedrespectively through two of the concentric slot-s cl d formed in theface plate, and through the flange d of the cam toe, and having appliedto their projecting ends the nuts (1 01 The cam too is providedwith aconcentrically curved flaring shoulder d which bears upon the conicalperiphery of the face plate against which it is firmly clamped by thetightening action of the nuts 02 (1 What is claimed as the inventionis 1. The adjustablepickercam forloomsherein described, the sameconsisting of a circular face plate having a. conical periphery rigidlyfastened to the picker cam shaft, a cam toe provided with a concentricshoulder shaped correspondingly to the periphery of the face plate, andadapted to bear thereupon, and means for clamping said shoulder tightlyagainst the periphery of the said face plate, substantially as and forthe purpose set forth.

2. The face-plate a rigidly keyed to the cam-shaft 0 having itsperiphery conical ially as set forth.

ABRAM D. EMERY. Witnesses:

EDGAR L. CROSSMAN, GEORGE L. WHITE.

